Radiopacity of Methacrylate and Silorane Composite Resins Using a Digital Radiographic System

Table 2

Radiopacity (shades of gray) and the aluminum equivalent in millimeters (mm Al) of the different materials evaluated.

	Mean gray	Radiopacity value (mm Al equivalent)
Tetric Ceram	84.20 (±9.68)	3.10 (±0.32)
TPH	72.20 (±7.05)	2.65 (±0.31)
SDR	52.60 (±3.51)	1.94 (±0.14)
Z350	48.20 (±2.77)	1.78 (±0.12)
Z350 flow	38.40 (±3.97)	1.44 (±0.16)
P90	25.60 (±1.00)	0.99 (±0.12)
Enamel	22.60 (±5.86)	0.91 (±0.22)
Dentin	14.20 (±2.28)	0.63 (±0.12)

Different letters: significant difference between resins, (ANOVA-Tukey test).
Significant difference for the enamel (x) and dentin (y), (ANOVA-Dunnett’s test).
No significant difference for the 1 mm Al, (one-sample t-test).